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Dispute over method to detect gravitational redshift

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Does an atom interferometer test the gravitational redshift at the Compton frequency?
The published version of the paper "Does an atom interferometer test the gravitational redshift at the Compton frequency?" Wolf P et al  2011 Class. Quantum Grav. 28 145017 will be freely available online from Thursday 9 June.

Classical and Quantum Gravity
Classical and Quantum Gravity is an established journal for physicists, mathematicians and cosmologists in the fields of gravitation and the theory of spacetime. The journal is now the acknowledged world leader in classical relativity and all areas of quantum gravity.

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